<template>
  <div class="Roles-container">
    <!-- 面包屑区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <!--2 为echarts准备一个具备大小（宽高）的Dom -->
      <div
        id="main"
        style="width:600px;height:400px"
      ></div>
    </el-card>
  </div>
</template>

<script>
//1 导入echarts
import _ from "lodash"
import * as echarts from "echarts"
export default {
  data() {
    return {
      // 需要合并的选项
      options: {
        title: {
          text: "用户来源"
        },
        tooltip: {
          trigger: "axis",
          axisPointer: {
            type: "cross",
            label: {
              backgroundColor: "#E9EEF3"
            }
          }
        },
        grid: {
          left: "3%",
          right: "4%",
          bottom: "3%",
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: "value"
          }
        ]
      }
    }
  },
  created() {},
  methods: {},
  //此时页面上的元素，已经被渲染完毕了
  async mounted() {
    // 3基于准备好的dom ,初始化echarts实例
    var myChart = echarts.init(document.getElementById("main"))
    const { data: res } = await this.$http.get("reports/type/1")
    if (res.meta.status !== 200) {
      return this.$Message.error("获取折线图数据失败")
    }
    // 4指定图表的配置项和数据
    _.merge(res.data, this.options)
    // 5使用刚指定的配置项和数据显示图表。
    myChart.setOption(res.data)
  }
}
</script>

<style lang="less" scoped>
</style>
